Source code for airflow.contrib.sensors.weekday_sensor

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import six
from airflow.contrib.utils.weekday import WeekDay
from airflow.sensors.base_sensor_operator import BaseSensorOperator
from airflow.utils import timezone
from airflow.utils.decorators import apply_defaults

[docs]class DayOfWeekSensor(BaseSensorOperator): """ Waits until the first specified day of the week. For example, if the execution day of the task is '2018-12-22' (Saturday) and you pass 'FRIDAY', the task will wait until next Friday. **Example** (with single day): :: weekend_check = DayOfWeekSensor( task_id='weekend_check', week_day='Saturday', use_task_execution_day=True, dag=dag) **Example** (with multiple day using set): :: weekend_check = DayOfWeekSensor( task_id='weekend_check', week_day={'Saturday', 'Sunday'}, use_task_execution_day=True, dag=dag) **Example** (with :class:`~airflow.contrib.utils.weekday.WeekDay` enum): :: # import WeekDay Enum from airflow.contrib.utils.weekday import WeekDay weekend_check = DayOfWeekSensor( task_id='weekend_check', week_day={WeekDay.SATURDAY, WeekDay.SUNDAY}, use_task_execution_day=True, dag=dag) :param week_day: Day of the week to check (full name). Optionally, a set of days can also be provided using a set. Example values: * ``"MONDAY"``, * ``{"Saturday", "Sunday"}`` * ``{WeekDay.TUESDAY}`` * ``{WeekDay.SATURDAY, WeekDay.SUNDAY}`` :type week_day: set or str or airflow.contrib.utils.weekday.WeekDay :param use_task_execution_day: If ``True``, uses task's execution day to compare with week_day. Execution Date is Useful for backfilling. If ``False``, uses system's day of the week. Useful when you don't want to run anything on weekdays on the system. :type use_task_execution_day: bool """ @apply_defaults def __init__(self, week_day, use_task_execution_day=False, *args, **kwargs): super(DayOfWeekSensor, self).__init__(*args, **kwargs) self.week_day = week_day self.use_task_execution_day = use_task_execution_day if isinstance(self.week_day, six.string_types): self._week_day_num = {WeekDay.get_weekday_number(week_day_str=self.week_day)} elif isinstance(self.week_day, WeekDay): self._week_day_num = {self.week_day} elif isinstance(self.week_day, set): if all(isinstance(day, six.string_types) for day in self.week_day): self._week_day_num = {WeekDay.get_weekday_number(day) for day in week_day} elif all(isinstance(day, WeekDay) for day in self.week_day): self._week_day_num = self.week_day else: raise TypeError( 'Unsupported Type for week_day parameter: {}. It should be one of str' ', set or Weekday enum type'.format(type(week_day)))
[docs] def poke(self, context):'Poking until weekday is in %s, Today is %s', self.week_day, WeekDay(timezone.utcnow().isoweekday()).name) if self.use_task_execution_day: return context['execution_date'].isoweekday() in self._week_day_num else: return timezone.utcnow().isoweekday() in self._week_day_num

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